[DPB] Remove unnecessary prompts

[chiourung]

What I did

admin@SPINE-1-AS7326-56X-4-8U:~$ sudo config int breakout Ethernet76 "2x50G" -y

Running Breakout Mode : 1x100G[40G]
Target Breakout Mode : 2x50G

Ports to be deleted :
 {
    "Ethernet76": "100000"
}
Ports to be added :
 {
    "Ethernet76": "50000",
    "Ethernet78": "50000"
}
sonic_yang(6):Note: Below table(s) have no YANG models: REST_SERVER
Below Config can not be verified, It may cause harm to the system
 {}
Do you wish to Continue? [y/N]:

The unverified config is empty, it would not cause harm to the system.

How I did it

check the length of the unverified table

How to verify it

admin@SPINE-1-AS7326-56X-4-8U:~$ sudo config int breakout Ethernet76 "2x50G" -y

Running Breakout Mode : 1x100G[40G]
Target Breakout Mode : 2x50G

Ports to be deleted :
 {
    "Ethernet76": "100000"
}
Ports to be added :
 {
    "Ethernet76": "50000",
    "Ethernet78": "50000"
}
sonic_yang(6):Note: Below table(s) have no YANG models: REST_SERVER
Breakout process got successfully completed.
Please note loaded setting will be lost after system reboot. To preserve setting, run `config save`.

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).